North Korea has a long-standing history of animosity towards the United States, dating back to the Korean War in the 1950s. During the war, the United States supported South Korea against North Korea, which resulted in the division of the Korean Peninsula into two separate countries. North Korea views the United States as an imperialist power that has interfered in its internal affairs and supported its southern rival.
One of the key reasons for North Korea's anger is the presence of US military forces in South Korea. North Korea perceives this as a threat to its sovereignty and a sign of continued American influence over the region. The United States and South Korea regularly conduct joint military exercises, which further heighten tensions with North Korea and reinforce Pyongyang's belief that it is under threat.
Additionally, North Korea has expressed resentment over US economic sanctions and international pressure aimed at curbing its nuclear and missile programs. North Korea sees these sanctions as unfair and unjust, and believes that the United States is trying to undermine its economic development and political system.
Overall, North Korea's anger towards the US stems from a combination of historical grievances, geopolitical rivalries, and ongoing tensions related to military and economic issues. These factors contribute to the complex dynamics and ongoing conflicts between North Korea and the United States.